Consolidated Statements Of Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
INTEREST AND DIVIDEND INCOME:
Loans, including fees	$ 115,203	$ 114,306	$ 230,428	$ 226,797
Investment securities available for sale	2,911	3,494	5,775	6,618
Other interest and dividend earning assets	1,412	2,643	3,375	5,316
Total interest and dividend income	119,526	120,443	239,578	238,731
INTEREST EXPENSE:
Deposits	37,483	35,077	75,799	67,839
Borrowed funds	17,005	17,605	34,556	35,319
Total interest expense	54,488	52,682	110,355	103,158
NET INTEREST INCOME	65,038	67,761	129,223	135,573
PROVISION (CREDIT) FOR LOAN LOSSES	6,000	(4,000)	3,000	(6,000)
NET INTEREST INCOME AFTER PROVISION (CREDIT) FOR LOAN LOSSES	59,038	71,761	126,223	141,573
NON-INTEREST INCOME:
Net gain on the sale of loans	3,138	451	6,063	562
Increase in and death benefits from bank owned life insurance contracts	2,461	1,874	4,022	3,421
Other	1,229	786	6,527	2,028
Total non-interest income	8,947	4,906	20,877	9,582
NON-INTEREST EXPENSE:
Salaries and employee benefits	27,216	26,152	53,101	51,516
Marketing services	4,029	6,719	8,490	11,516
Office property, equipment and software	6,534	6,261	12,980	13,247
Federal insurance premium and assessments	2,768	2,370	5,387	5,136
State franchise tax	1,191	1,282	2,323	2,544
Other expenses	7,820	7,943	14,597	14,748
Total non-interest expense	49,558	50,727	96,878	98,707
INCOME BEFORE INCOME TAXES	18,427	25,940	50,222	52,448
INCOME TAX EXPENSE	1,170	5,810	7,323	11,985
NET INCOME	$ 17,257	$ 20,130	$ 42,899	$ 40,463
Earnings per share—basic and diluted	$ 0.06	$ 0.07	$ 0.15	$ 0.14
Weighted average shares outstanding
Basic	275,835,243	275,359,201	275,706,011	275,367,821
Diluted	278,101,329	277,343,155	277,990,253	277,197,565
Banking
NON-INTEREST INCOME:
Fees and service charges, net of amortization	$ 2,119	$ 1,795	$ 4,265	$ 3,571